When Taz asked his question, Roger ______.

单项选择题The outback town was given a library because ______.

单项选择题The word advocates” in the first paragraph is closest in meaning to which of the following

单项选择题What is the author's attitude toward the claims made by advocates of health foods

单项选择题According to the last paragraph, consumers who believe that organic foods are better than conventionally grown foods are often ______.

单项选择题The author implies that there is cause for concern if consumers with limited incomes buy organic foods instead of conventionally grown foods because ______.